The drkhsh.at website does not allow itself to be embedded in another website:

  $ curl -sSI https://drkhsh.at/ | grep -i frame
  x-frame-options: SAMEORIGIN

See also a similar discussion here: https://codeberg.org/susam/wander/issues/3

There is also a note in the project README requesting console owners to be mindful of this while adding links: https://codeberg.org/susam/wander#caution